Improvement in devices for registering the slipping of locomotive-wheels



l. W. BOYLE.

Devices for Registering the Slipping of Locomotive-Wheels.

NO i50746, PatentedMyi2,i874.

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liluii i @i il AM M1770 -L///OMAP//IL Cow. Kramm/veis Mauss) 'JNITEDSTATES PATENT OFFICEo JAMES IV. BOYLE, OF NEWv TEXAS, PENNSYLVANIA.

IMPROVEMENT IN DEVICES FOR REGISTERING THE SLIPPING 0FLOCOMOTIVErWHEELS.

Specification forming part of Letters Patent No. l 50,746, dated May 12,1874; application filed April 4, 1874.

To all whom it may concern:

Be it known that I, JAMES V. BOYLE, of New rIexas, in .the county ofAllegheny and State of Iennsyhiania, have invented a new and ImprovedMachine for Slips of Locoinotive-lVheels, of which the following is aspecilication:

My invention consists of a couple of Wheels or disks independent of eachother, driven synchronously, one by the truck-axle and the other by thedriving-wheel axle, and having a cantanti-ratchet mechanism, socontrived that in case the driving-Wheel slips, and thus turns one ofsaid pulleys faster than the other, the paivl mechanism Will be causedto move the recording apparatus one degree for each turn of oneWheel-more than the other, and thus record the slip.

Figure l is a side elevation of a locomotive with my improvedslip-measuring apparatus. Fig. 2 is partly a plan view and partly al1ori zontal section of the apparatus. Fig. 3 is partly a frontelevation and partly a section of the recording apparatus.

Similar letters ot' reference indicate corresponding parts.

A is a pulleymonnted on a shaft, B, snspcnded by any suitable case orframe, E F, from the boiler or trnck'frame. C is a belt from anotherpulley on one of the truck-axles running on pulley A, and turning it. Dis another pulley running loosely on shaft B, and turned by a belt, G,from the axle II of the locomotive driving-Wheels. rlhe pulleys areproportioned so that when the driving- Wheels run Without slippingpulleys A D will turn alike as to speed, but when the drivers slip thepulley D will be turned faster, and for each revolution gained of A, itscam-shaped side J will move the lever L of a ratchet-lever, M, whichWorks the train N O of a recording tegistering the.

apparatus, by which the number of revolutions of the drivers gained overthe truck-Wheels by slipping will be recorded on the dial l). The leverL is connected to the pavvl-lever M by a rod, Q, ruiming through thehollow shaft B, and revolving with it, being made in two sections, andswiveled or coupled at so as to revolve in one part With lever L, and atthe saine time actuate the pand-lever. rIlhis rod, also the pawl-leverand the lever L, are pushed back by a spring, R. Ihe pulleys A and D maybe geared to the axles by cogged gean in g, if preferred 5 but it isbelieved with proper means for keeping the belts tight they will be thebest. The same object can be accomplished by a large wheel loose on theaxle of the driving-wheels gearing with a wheel fast on the truckaxle,and having a register on it to be Worked by a cam on the drivin g-Wheelor shalt as it slips by the loose Wheel, Whose rotations would beregulated to those of the truck-axle. The same contrivanee may also beused to record slip of bits and the like.

rlhe object of recording the slip is to check against carelessness onthe part of the engineer, which is mainly thc cause thereof, and thus toprevent it as much as possible, as it is very injurious to the Wheelsand the rails.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination of a wheel or pulley rotatedsynchronously with 011e of the truckaxles, a cam or wheel revolved bythe driving- Wheel axle, a ratchet mechanism, a lever operating suchratchet mechanism, and a recording mechanism, substantially asspecified.

JAMES XV. BOYLE.

Vitnesses:

WlisrnNsToN LoWnY, GrrAuLEs RITTER.

